Stuck in Recovery mode. Please help.
Hi everyone. I just got a free iPhone from a customer of mine last night. Admittedly, I'm an Android guy, but I'd like to see what an iPhone is like. I've never even held one before, so I don't know anything about them. When I turned the phone on and connected it to my computer, iTunes launched and said I had an iPhone in recovery mode. It said I needed to download new firmware for the iPhone. I downloaded what it needed and went to install the firmware. Problem is when I do it, it fails to an error message that says "The iPhone "iPhone" could not be restored. An unknown error occured (40)." I have no idea what to do from here. I've tried a few suggestions I've found on the web but nothing has worked. Any help would be appreciated, especially detailed help lol. Thanks and have a great day. By the way, I know the phone is at least unlocked because the guy was using T-Mobile service on it. I don't know through which method it was unlocked. And I also don't know if it is jailbroken.